add_contextual_help( $current_screen, '<p>'. __( 'You can edit the information left in a comment if needed. This is often useful when you notice that a commenter has made a typographical error.' ) .'</p>'.

'<p>'. __( 'You can also moderate the comment from this screen using the Status box, where you can also change the timestamp of the comment.' ) .'</p>'.